Abstract: A ramp signal generating method and a generator thereof, and a pulse width modulation signal generator are provided. The ramp signal generating method includes following steps: receiving an error signal, wherein the error signal relates to an output voltage of a power converter; generating an error delayed signal according to the error signal; and providing a ramp signal according to the error signal and the error delayed signal. The ramp signal is phase leading and inverting compared to the error signal. The ramp signal serves to improve a response speed of the power converter.

Abstract: A time signal generating circuit and a time signal generating method are provided. The time signal generating method includes following steps: receiving a feedback voltage and a reference voltage to provide a first control signal, wherein the feedback voltage is related to an output voltage of a power converter; receiving an input voltage and a default voltage to provide a second control signal; and adjusting an on-time of a pulse width modulation signal according to the first control signal and the second control signal.

Abstract: A time signal generator and a time generating method used in a power converter are provided. The time generating method includes following steps. An error delay signal is generated according to an error signal, wherein the error signal is related to an output voltage of the power converter. A time signal is generated according to the error signal and the error delay signal. The time signal may serve to improve a response speed of the power converter.

Abstract: A method with function parameter setting and an integrated circuit using the same are provided. The integrated circuit includes a function pin coupled to an external setting unit, a switch unit, and first and second function adjustment circuits. The first function adjustment circuit includes first and second current sources. The second function adjustment circuit detects a percentage of a divided voltage at the function pin, to provide a reference value and to set a second function parameter. The first function adjustment circuit uses the first current source to detect a first voltage detecting value at the function pin, and compares the first voltage detecting value with a default value. The switch unit switches the first and second current sources according to a compare result. The present invention adopts an integrated circuit for switching a plurality of current sources and detections, and may determine more resistance value setting intervals.

Abstract: A method with function parameter setting and an integrated circuit using the same are provided. The integrated circuit includes a function pin coupled to an external setting unit, a switch unit, and first and second function adjustment circuits. The first function adjustment circuit includes first and second current sources. The second function adjustment circuit detects a percentage of a divided voltage at the function pin, to provide a reference value and to set a second function parameter. The first function adjustment circuit uses the first current source to detect a first voltage detecting value at the function pin, and compares the first voltage detecting value with a default value. The switch unit switches the first and second current sources according to a compare result. The present invention adopts an integrated circuit for switching a plurality of current sources and detections, and may determine more resistance value setting intervals.

Abstract: A timing generator for a power converter is provided. The timing generator includes a threshold voltage generation circuit and a timing generation unit. The threshold voltage generation circuit receives an error signal related to an output voltage of the power converter. The threshold voltage generation circuit generates a threshold voltage according to the error signal. The timing generation unit generates a timing signal according to the error signal, the threshold voltage and a control signal. The timing generation unit provides a tracking signal. A width of the timing signal depends on a time when tracking signal departed from a level of the error signal to a level of the threshold voltage. The present invention also provides a timing signal generation method for the power converter.

Abstract: A time signal generating circuit and a time signal generating method are provided. The time signal generating method includes following steps: getting a first phase signal and a second phase signal, wherein the first phase signal is related to a first phase current and the second phase signal is related to a second phase current; sampling and holding the first phase signal to generate a first signal and sampling and holding the second phase signal to generate a second signal; using an error amplifier to generate a balance signal according to the first signal and the second signal; and generating a time signal according to the balance signal. The present invention is capable of avoiding the imbalance of each phase current caused by the offset values between different elements in conventional technology.

Abstract: A bandgap reference circuit is provided and which includes an operating voltage, a current mirror, a first p-channel metal-oxide semiconductor (PMOS) transistor and an amplifier. The current mirror is coupled to the operating voltage. The first PMOS transistor is coupled to the operating voltage and the current mirror. The amplifier is coupled to the current mirror and the first PMOS transistor. When the bandgap reference circuit is activated, the operating voltage starts to supply voltage such that the first PMOS transistor is turned on first. When the operating voltage is higher than a preset voltage level, the first PMOS transistor is turned off, in order to complete an start-up process.

Abstract: A phase adjustment circuit of a power converter, the power converter, and a control method of the power converter are provided. The control method includes following steps. A delay signal is generated according to an error signal, and the error signal is associated with an output voltage of the power converter. A difference between the error signal and the delay signal is amplified. A control signal is provided according to the amplified difference and the error signal, and a phase of the control signal leads a phase of the error signal. The control signal serves to improve a response speed of the power converter.

Abstract: A voltage compensation circuit and an operation method thereof are provided. The voltage compensation circuit is suitable for a display device. The display device includes a direct-current voltage converter, a voltage level shifter, a panel, and a gate driving circuit. The voltage compensation circuit includes a voltage divider providing a divided voltage form a gate pulse signal, a comparing unit, a time counting unit and a processing unit. The comparing unit receives the divided voltage to provide at least one comparison result. The time counting unit provides a plurality of timing control signals at different time points according to the divided voltage. The processing unit provides a voltage reference signal to the direct-current voltage converter according to the plurality of timing control signals and the comparing result, and accordingly, the direct-current voltage converter adjusts an output voltage relating to the gate driving circuit.

Abstract: A DC-DC converter is provided. When a load of the DC-DC converter is too light, the DC-DC converter can raise a frequency of its PWM signal, and reduce a pulse width of the PWM signal, so as to avoid the frequency of the PWM signal falling into a frequency range that can heard by human's ear and maintain high conversion efficiency of the DC-DC converter.

Abstract: A DC-DC controller and a multi-ramp signal operating method thereof are provided. The DC-DC controller includes a ramp generating unit, a comparator, a logic circuit and a switch unit. The ramp generating unit generates a first interior-ramp signal and a second interior-ramp signal alternately. The logic circuit generates the first and second control signals according to a comparison signal of the comparator. The switch unit is configured to switch one of the first interior-ramp signal and the second interior-ramp signal alternately to a second terminal of the comparator according to the first and second control signals. When the second interior-ramp signal is switched to the comparator, the first interior-ramp signal is charged to a first voltage level by the ramp generating unit. In another switch procedure, the second interior-ramp signal is charged to a second voltage level by the ramp generating unit.

Abstract: The present invention is an optical proximity sensor and manufacturing method thereof. The optical proximity sensor has an optical sensing unit, an illuminating unit, multiple transparent gels and a package. The package encapsulates the optical sensing unit and the illuminating unit. The transparent gels are respectively formed on top surfaces of the optical sensing unit and the illuminating unit. The transparent gels respectively have a convex part and a recess formed in the convex part. The package has through holes communicating with the recesses of the transparent gels to form openings. In a step of injecting encapsulant gel, because the transparent gels are still plastic, the protrusions can closely attach to the transparent gels. The encapsulant gel is prevented from forming above the sensing part and the illuminating part.

Abstract: A gate driver and a control method thereof are provided. The gate driver is coupled to a capacitor. The gate driver includes a timing control circuit and a switch unit. The switch unit is coupled to the timing control circuit, the capacitor and a working voltage. The timing control circuit receives an input control signal and performs a timing control to the input control signal to generate a first control signal and a second control signal. The switch unit includes a first switch element and a second switch element. The second switch element controls a body voltage of the first switch element according to the second control signal. The switch unit enables the working voltage to charge the capacitor via the switch unit according to the first control signal and the second control signal.

Abstract: A DC-DC controller is provided. The DC-DC controller is connected to an output stage and a load, and the output stage is connected to the load through an output inductor. The DC-DC controller includes an error amplifier, a pulse width modulation (PWM) generation circuit and a compensation circuit. A first input terminal of the error amplifier is connected to one terminal of the output inductor. A second terminal of the error amplifier receives a reference voltage. The PWM generation circuit is connected to the error amplifier and provides a PWM signal to the output stage. The compensation circuit is at least connected to an output terminal of the error amplifier. The compensation circuit includes an adjustable capacitor circuit. The adjustable capacitor circuit adjusts an equivalent capacitance value according to a change of the load dynamically, so as to speed up a reaction rate in the transient response.

Abstract: An integrated circuit with multi-functional parameter setting and a multi-functional parameter setting method thereof are provided. The multi-functional parameter setting method includes the following steps: providing the integrated circuit, wherein the integrated circuit includes a multi-functional pin and a switch unit, wherein the multi-functional pin is coupled to an external setting unit, and the switch unit includes an operational amplifier; sensing a programmable reference voltage of the external setting unit through one operation of the switch unit and executing a first function setting according to the programmable reference voltage; and sensing a programmable reference current related to the external setting unit through another operation of the switch unit and executing a second function setting according to the programmable reference current, wherein a value of the programmable reference current is related to the programmable reference voltage.

Abstract: A voltage identification definition (VID) reference voltage generation circuit and a boot voltage generating method thereof are provided. In the boot voltage generating method, a VID reference voltage generation circuit is provided. The VID reference voltage generation circuit includes a preset voltage providing unit, a switch and a VID input signal detection unit. When the VID input signal detection unit detects no input of a VID signal, a control signal is generated to control the switch, such that the preset voltage providing unit provides an adjustable preset voltage.

Abstract: A DC-DC converter and a voltage conversion method thereof are provided. The DC-DC converter includes an output unit, a control unit and a trigger unit. The output unit converts an input voltage into an output voltage. The control unit generates a control signal according to the input voltage, an output feedback voltage related to the output voltage and a reference voltage, so as to make the output unit generate the output voltage. The trigger unit generates a first trigger signal according to the control signal, the output feedback voltage and the reference voltage. When the output feedback voltage is less than the reference voltage by a preset voltage, the control unit controls the output unit to perform a voltage-regulating process to the output voltage in advance.

Abstract: A multi-phase DC-DC power converter is provided, which includes a pulse width modulation (PWM) controller and a plurality of output stage circuits. The plurality of output stage circuits converts an input voltage into an output voltage. The PWM controller includes a feedback circuit and a PWM generation module. The feedback circuit outputs a trigger signal according to the output voltage and a ramp signal. The PWM generation module at least generates a first PWM signal and a second PWM signal. In addition, a waveform of the first PWM signal partially overlaps a waveform of the second PWM signal at a logic high level.

Abstract: An integrated circuit with multi-functional parameter setting and a multi-functional parameter setting method thereof are provided. The multi-functional parameter setting method includes the following steps: providing the integrated circuit, wherein the integrated circuit includes a multi-functional pin and a switch unit, wherein the multi-functional pin is coupled to an external setting unit, and the switch unit includes an operational amplifier; sensing a programmable reference voltage of the external setting unit through one operation of the switch unit and executing a first function setting according to the programmable reference voltage; and sensing a programmable reference current related to the external setting unit through another operation of the switch unit and executing a second function setting according to the programmable reference current. wherein a value of the programmable reference current is related to the programmable reference voltage.